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Candles: the shape records a fight, it does not predict the next one
Three shapes out of the whole candlestick zoo have a mechanical explanation. And none of them means anything until you answer WHERE it appeared.
A candle is a compressed record of a fight over a period: where it started, where it ended, and how far price was dragged each way. All it contains is four numbers. So a candle predicts nothing; it reports how a stretch of time that has already passed ended. What makes it useful is not the shape itself but the fact that a shape sometimes betrays the presence of a large participant: if price was taken far and brought back within the same hour, somebody was standing there with size.
Three shapes with a mechanical explanation
| Shape | What it recorded | When it means something |
|---|---|---|
| long wick | price went there and was rejected | the wick runs into a higher-timeframe level |
| engulfing | the whole previous range covered by one period | after a long lull or at the edge of a range |
| small body after a large move | the fight stalled, the sides are even | at the end of a long move, not in the middle |
The rest of the candlestick vocabulary — three crows, morning star, hanging man — are names invented at various times by various people. Not necessarily useless, but not one of them adds a mechanism beyond the three rows above: the same body, the same wicks, the same location. Learning forty names instead of three is a reliable way to find on a chart whatever you are looking for.
How a long wick is measured
An hourly candle: open 184.20, high 190.50, low 183.60, close 185.10. The body is 0.90, the upper wick 5.40 — six times the body. Read it like this: within the hour price was taken to 190.50 and everything above 185.10 was handed back inside that same hour. That is a fact about a rejected price. It becomes a signal only if 190.50 is somebody's level: last week's high, a round price, the edge of a range. The same candle in the middle of empty travel means nothing.
Reading the shape before the location
Hammers and engulfings turn up by the dozen — on any given day you will find ten of them on a single coin. If you hunt for the shape first, you will always find it and will always be able to explain why this particular one was real. The order must be reversed: location first (a level, the edge of a range, the end of a stretched move), and only then the question of what the candle drew there. A candle confirms a decision made on other grounds; it is not the grounds.
Reading a candle before it closes
Until the period ends there is no shape: what looks like a perfect hammer right now will turn into an ordinary red candle over the remaining forty minutes. This is not a detail — an entire category of false entries is built on it, because an unfinished candle shows its most convincing picture exactly in the middle of a move. The rule is simple: decisions are made on closed candles. If waiting for the close is unbearable, you are trading the wrong scale — take a smaller one, where closes come more often.
The shape depends on where you cut time
The same move looks like a hammer on the hourly scale and like four ordinary candles on the fifteen-minute one, with no hammer among them. Neither picture is the "real" one: a candle is the result of cutting a continuous stream of trades at points you chose. Hence a consequence that is rarely mentioned: daily candles differ between exchanges because their day starts at different times. If your pattern disappears when you switch to the neighbouring scale or to another exchange, it was a property of the slicing, not of the market.
What a candle genuinely adds
One thing that neither a level nor volume contains: the speed of rejection. A level says where the orders are; volume says how many took part; a long wick says how FAST price was pushed back. A return inside a single hour and a slow drift back over a day are different events even though the final price is the same. A fast rejection means the orders at the level were sitting ready and were large. For that one thing candles are worth reading.
Candles are the most deceptive part of chart reading: on history you always see the shape that worked and never notice the forty identical ones that did not. The only honest test is bar replay: the chart plays candle by candle and you decide before you see the next one. Ours has an honest cut-off — future data is not fed even into the indicators.
The chart and bar replayThirty candles blind
Open bar replay on any coin, hourly scale, and play thirty candles in a row. Before each step write one word: up, down, or don't know. Counting the "don't knows" is the most valuable part of this exercise: if they are fewer than half, you are probably manufacturing confidence. Then repeat the same run, but decide only where the candle sits on a level you marked in advance. Compare the hit rate between the two modes — that is your answer to whether shape adds anything without location.
There is a perfect hammer on the chart, but the hour's volume is half the usual. How much does that change things?
A great deal. A long wick means price was taken away and brought back; the value of that lies in somebody meeting it with size. If volume is below normal, there was almost nothing doing the bringing back — most likely nobody supported price in a thin book, and the very same wick will be drawn again next time with no resistance at all. Shape without volume and without location is a picture.
Why does the same daily candle look different on different exchanges?
Because their day starts at different times, and a candle is only a slice cut by the clock. Shifting the boundary by a few hours moves the high and the low into the neighbouring candle, and the pattern falls apart. Practical conclusion: if your construction rests on one particular daily candle, check it on another exchange and on the neighbouring scale. What survives both is a property of the market; what disappears was a property of the slicing.